CN202360756U - Sealing device of four-in-one set shaft - Google Patents
Sealing device of four-in-one set shaft Download PDFInfo
- Publication number
- CN202360756U CN202360756U CN 201120457821 CN201120457821U CN202360756U CN 202360756 U CN202360756 U CN 202360756U CN 201120457821 CN201120457821 CN 201120457821 CN 201120457821 U CN201120457821 U CN 201120457821U CN 202360756 U CN202360756 U CN 202360756U
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- CN
- China
- Prior art keywords
- sealing
- prismatic
- positive
- stuffing box
- box gland
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a sealing device of a four-in-one set shaft. The sealing device comprises a sealing sleeve and is characterized in that a plurality of inner sunken T-shaped clamping grooves are arranged at the bottom of the sealing sleeve; a clamping block is arranged in each clamping groove; each clamping block is connected with a corresponding sealing plate by a fastening part; a sealing hole layer composed of a plurality of regular hex-prismatic holes is arranged on the bottom surface of the sealing plate. The sealing device has the advantages of good wearing resistance, good sealing performance and convenience in installation and overhaul.
Description
Technical field
The utility model is specifically related to a kind of four unification unit shaft seal devices.
Background technique
In nitric acid production, four unification units are meant the combination of air compressor, nitrogen oxide gas compressor, tail gas turbine compressor and steam turbine.It is the unit that pressure, power are provided in the technological process of nitric acid manufacturing industry, is most crucial in a whole device equipment.Four unification unit shaft seal structures commonly used at present are the comb structure sealing, promptly stud with one deck " J " shape labyrinth seal teeth in the bottom surface of stuffing box gland (front axle stuffing box gland and rear axle stuffing box gland), the drawback analysis that the comb structure sealing exists:
A) four unification units are in the start and stop process, and when rotor speed during in critical speed of rotation, Oscillation Amplitude is bigger, if the sealing radial clearance is installed hour, the sealing tooth is easy to wearing and tearing, and it is big that the radial seal gap becomes, and leakage rate increases.
B) because the increase of leakage rate; Steam all must increase and raise to the heated zones length and the temperature of axle to some extent; The axial length of axle increases, and the difference that expands becomes big, the short tooth and hair looks of axle convex platform and sealing block displacement is occurred what is called " is fallen platform " and long tooth by stretch bending and the phenomenon of " lodging ".Lean on the sealing effect that multistage throttle expands to can not get guaranteeing that a large amount of steam more can leak out so.
When c) tooth with axle friction took place, moment produced a large amount of heat.At the corresponding axle upper groove place of the long tooth of sealing, heat has little time to distribute, and this place's diameter is again little, just might cause the local superheating of axle and causes permanent bending of rotor, and danger is coerced the safety of unit.So during unit maintenance, a lot of users have to artificial make radial clearance big, would rather let steam leakage also be reluctant to produce the sound friction, are the safety that cost is guaranteed unit to sacrifice economic benefit.
D) nonuniformity of comb-shaped sealing annular cavity is the root that produces close stream exciting.The close stream exciting that four unification unit high pressure rotors are produced solves the safe operation that jeopardizes unit in case generation is very difficult.
The existence of above-mentioned just sealing drawback; Great amount of high-temperature high pressure steam (high pressure side) and gland steam enter in the bearing housing from the crown slit that shaft end seal spills fixed gear piece flinger ring on the suitable bearing housing in back; Again by return tube to headstock, water of condensation is all sneaked in the oil in this distance.When the oil pumping cigarette blower fan draft on the main fuel tank was big, this situation was even more serious.
The model utility content
The purpose of the utility model is to solve the existing technology nitric acid production and adopts the comb structure sealing with four unification unit arbors; The sealing tooth is easy to wear, poor sealing, the defective that jeopardizes unit safety operation; Provide a kind of not easy to wear, four unification unit shaft seal structures of good airproof performance.
The utility model is realized through following technological scheme:
Be a kind of four unification unit shaft seal devices; Comprise stuffing box gland; It is characterized in that the bottom surface of stuffing box gland is provided with the T shape draw-in groove of a plurality of indents; Fixture block all is installed in each draw-in groove, and each fixture block all connects through fastening piece and corresponding sealing plate, said sealing plate the bottom surface be provided with the closed hole layer that a plurality of positive six prismatic holes are formed.
Stuffing box gland is divided into front axle stuffing box gland and rear axle stuffing box gland.
Fastening piece is bolt or screw.
The sealing plate bottom surface of the utility model is the positive six prismatic cavernous structures of being processed by the thick Ni-based high-temperature alloy anti-rust metal thin plate of 0.04-0.10mm.Through vacuum brazing positive six prismatic cavernous structure tape weldings are formed positive six prismatic cavernous structure formulas sealing on the sealing plate bottom surface.Because it is softer to make the sheetmetal quality of positive six prismatic cavernous structures, forms after the positive six prismatic cavernous structures, the integral rigidity of positive six prismatic cavernous structure bands is better again.So it has the incomparable advantage of other sealing.
The characteristics of positive six prismatic cavernous structure formulas sealing
A), because the special construction pattern and the soft characteristic of quality of the sealing of positive six prismatic cavernous structure formulas, positive six prismatic cavernous structure formulas sealing can not injure the diameter of axle surface that is contacted, and axle is played a good protection.
B), just because of positive six prismatic cavernous structure bands than software feature, the assemblage gap of positive six prismatic cavernous structure formulas sealing can be got the lower limit in primary standard gap, seal clearance is little, sealing effect is good.
C), the positive six prismatic cavernous structure bands of positive six prismatic cavernous structure formulas sealings corresponding be the boss on the axle, be the root diameter larger part, even grazing can not cause the permanent bending of rotor distortion yet, thereby Safety performance is splendid.
D), the positive six prismatic cavernous structure band solderings of positive six prismatic cavernous structure formulas sealing are in the adjacent high tooth of former labyrinth sealing intermediate portion; The size broad; The axle convex platform phenomenon of " falling platform " can not occur all the time facing to positive six prismatic cavernous structure bands, can keep good seal clearance.
E), good seal performance; Because being annular cavity with labyrinth seal, it makes positive one by one six prismatic cavernous structures into; Equivalent throttling expansion quantity, effect increase, strengthen; Add the thermal dissipation that in positive six prismatic cavernous structure holes, circles round, reduce greatly to reveal and steam close flow velocity that it is ultimate attainment that the eddy current damping effect is performed to.On the other hand, the steaming that gets into positive six prismatic cavernous structure holes is close, recoils after being full of the nest hole, and to head-on leaking the very big retardation of the close generation of steaming of coming, sealability is splendid.Test shows that under the condition of identical gap and pressure, positive six prismatic cavernous structure formulas sealing on average reduces leakage loss 40%～70% than the comb-shaped sealing.Improve four unification unit efficiencies, had remarkable economic efficiency.
F), the positive six prismatic cavernous structure bands of positive six prismatic cavernous structure formulas sealings itself are very wear-resisting, service life is long, can keep seal clearance for a long time, sealing effect has permanence.
G), behind the positive six prismatic cavernous structures of the close entering of steaming; Formed the whirlpool shape close stream close stream that strong retardance leaks that recoils again; So the surface at axle forms the gasket that one deck has rigidity; Strengthened the vibration damping of axle, weakened the vibration of axle, the vibration during to buffering abnormal vibrations and critical speed of rotation is significant.
The utlity model has that wear-resisting property is good, good seal performance, installation overhaul advantage easily.
1) use the utility model can not injure the diameter of axle (to the damage by friction of the diameter of axle be merely ferrite comb-shaped sealing configuration 1/6); Security to rotor plays an important role.Adopt positive six prismatic cavernous structures sealing back more wear-resistant, corrosion-resistant than former sealing, on Safety performance, be sealed with very big raising than former.
2) effectively eliminate the generation of the close stream exciting of unit, guarantee the operation stability of rotor.
3) seal arrangement is in Installation and Debugging or in service miscellaneous equipment and parts are not had influence.
4) sealing plate is divided into polylith, is connected with fixture block respectively, is installed in the draw-in groove, and each sealing plate all can be adjusted separately, makes later service work convenient, and gap adjustment is more accurate, to reduce maintenance workload, to shorten maintenance duration significant.
5) through behind the positive six prismatic cavernous structure seal reconstructions, do not had axle to go up inserted operation during maintenance and lacked axle return that the mechanical repair plant is handled and operations such as dynamic balancing.Shorten the repair time of unit so greatly, increase work efficiency.
Description of drawings
Fig. 1 for the utility model be applied in before structural representation during shaft sealing;
Structural representation when Fig. 2 is applied in the back shaft sealing for the utility model;
Fig. 3 is that A among Fig. 1 is to enlarged diagram.
Shown in figure: 1 front axle stuffing box gland; 2 draw-in grooves; 3 screws; 4 fixture blocks; 5 sealing plates; 6 closed hole layers; 7 rear axle stuffing box glands.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further elaboration.
Embodiment 1
Like Fig. 1, shown in Figure 3, front axle stuffing box gland bottom surface is provided with 4 T shape draw-in grooves 2, is equipped with a fixture block 4 in each draw-in groove 2, and fixture block 4 is connected with sealing plate 5 through screw 3, and sealing plate 5 bottom surfaces are provided with the closed hole layer 6 that a plurality of positive six prismatic holes are formed.The positive six prismatic holes of closed hole layer 6 are processed by the thick Ni-based high-temperature alloy anti-rust metal thin plate of 0.04-0.10mm, through vacuum brazing closed hole layer 6 are welded on sealing plate 5 bottom surfaces.
The working procedure of present embodiment is an existing technology, no longer is described in detail.
As shown in Figure 2, stuffing box gland is a rear axle stuffing box gland 7, and other are with embodiment 1.
Claims (3)
1. unify unit shaft seal device for one kind four; Comprise stuffing box gland; It is characterized in that the bottom surface of stuffing box gland is provided with the T shape draw-in groove of a plurality of indents; Fixture block all is installed in each draw-in groove, and each fixture block all connects through fastening piece and corresponding sealing plate, said sealing plate the bottom surface be provided with the closed hole layer that a plurality of positive six prismatic holes are formed.
2. four unification unit shaft seal devices according to claim 1 is characterized in that stuffing box gland is divided into front axle stuffing box gland and rear axle stuffing box gland.
3. four unification unit shaft seal devices according to claim 1 is characterized in that fastening piece is bolt or screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120457821 CN202360756U (en) | 2011-11-18 | 2011-11-18 | Sealing device of four-in-one set shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120457821 CN202360756U (en) | 2011-11-18 | 2011-11-18 | Sealing device of four-in-one set shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202360756U true CN202360756U (en) | 2012-08-01 |
Family
ID=46571944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120457821 Expired - Fee Related CN202360756U (en) | 2011-11-18 | 2011-11-18 | Sealing device of four-in-one set shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202360756U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015003540A1 (en) * | 2013-07-12 | 2015-01-15 | 艾志工业技术集团有限公司 | Anti-deformation hook-embedded connection type combined sealing ring for hydraulic cylinder and air cylinder |
| CN105221474A (en) * | 2015-07-08 | 2016-01-06 | 上海舜发重型机械设备制造有限公司 | A kind of inwall has seal ring and the production method thereof of sealing configuration |
-
2011
- 2011-11-18 CN CN 201120457821 patent/CN202360756U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015003540A1 (en) * | 2013-07-12 | 2015-01-15 | 艾志工业技术集团有限公司 | Anti-deformation hook-embedded connection type combined sealing ring for hydraulic cylinder and air cylinder |
| CN105221474A (en) * | 2015-07-08 | 2016-01-06 | 上海舜发重型机械设备制造有限公司 | A kind of inwall has seal ring and the production method thereof of sealing configuration |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HELI TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SHANDONG UNITED CHEMICAL INDUSTRY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 256120 No. 36 Dongfeng Road, Yiyuan County, Shandong, Zibo Patentee after: SHANDONG LIAHERD CHEMICAL INDUSTRY CO., LTD. Address before: 256120 No. 36 Dongfeng Road, Yiyuan County, Shandong, Zibo Patentee before: Shandong United Chemical Industry Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171012 Address after: Yiyuan County Economic Development Zone 256100 Shandong city of Zibo province (county Yihe Road No. 1329) Patentee after: Shandong Heli Chemical Co., Ltd. Address before: 256120 No. 36 Dongfeng Road, Yiyuan County, Shandong, Zibo Patentee before: SHANDONG LIAHERD CHEMICAL INDUSTRY CO., LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120801 Termination date: 20181118 |